Abrading or grinding wheel



Nov. 18, 1958 A. RASKE ABRADING OR GRINDING WHEEL Filed Aug. 16, 1956INVENTOR.

ARTH UR RASKE z m NEYs I: A

2,860,458 'Pa ten ted Nov. 18,1958

ABRADING R GRINDING WHEEL 7 Arthur Raske, Willoughby, Uhio ApplicationAugust 16, 1956, Serial No. 604,400 6 Claims. (Cl. 51-191) My inventionrelates to a new and useful improvement in an abrading or grinding wheelin which a band of abrasive or grinding material is rotated by a bodywhich it embraces.

It is an object of the present invention to provide a wheel of thisclass which will be simple in structure,

economical of manufacture, durable, compact and highly I wheel of thisclass of flexible presser members mountedin the slots of a rotatablerigid core so that the presser members may be removed and replaced whendesired.

Other objects will appear hereinafter. It is recognized that variousmodifications and changes may be made in the detail of structureillustrated and it is intended that the present disclosure shall beconsidered to be but a preferred embodiment.

Forming a part of this application are drawings in which:

Fig. 1 is a side elevational view of the invention showing the flexiblemembers in position'when the wheel is stationary;

Fig. 2 is an elevational view of the invention showing the flexiblemembers in operative position during rotation of the wheel;

Fig. 3 is a perspective view of the removable flexible presser members.

As shown in the drawings, the invention comprises a rigid, preferablymetallic, core 7, having formed inwardly from the periphery 8 aplurality of axially directed spaced apart passages 9 arranged in acircumferential row. A chordally directed slot 10 is formed in the core7 adjacent each of the passages 9 and opens at one end into the adjacentpassage 9 and at the other end breaks outwardly through the periphery 8.

An independent and separate flexible plate 11 is provided at one endwith a bead 12 conforming in size and shape to the passage 9 so thatthis head may be inserted into this passage, the plate 11 engaging inthe slot 10. Formed on the outer end of each of these plates 11, whichare made of flexible material, is an individual flexible head 13extending the width of the plate and having its outer surface 14 curved.

The inner surface 15 of the head 13 is also curved so that when in theposition shown in Fig. 1 the inner surface will lie and conform to thepart of the periphery engaged.

Encircling these heads is a band 16 of an abrasive or grinding material.The band fits in snug relation over the heads. When the wheel is rotatedthe heads will swing outwardly, as shown in Fig. 2, this outwardswinging being effected through a flexing of the material of which thewheel is made so that the band 16 is stretched taut and held in fixedrelation relative to the core 7 while the grinding operation isperformed.

It is believed obvious that the band of abrasive or grinding materialmay be easily removed and replaced. Likewise, should any of the heads 13become worn or damaged they may also be replaced by sliding the plate 11axially out of the slot in which engaged. The bead 12 prevents radialoutwardmovement of the plate 11 while this plate is engaged in the slot.

Experience has shown that a grinding or abrasive wheel of this type isone which is highly eflicient in use and quite economical in itsoperation.

What I claim is:

1. A grinding or abrasive wheel of the class described, comprising: arigid rotatable wheel having inwardly from the periphery thereof aplurality of axially directed passages formed therethrough and arrangedcircumferentially in spaced relation and provided with chordallydirected slots extending outwardly from the passages and opening throughthe periphery, said slots being of less thickness than the diameter ofsaid passages; a flexible plate engageable in each of said slots; a beadon one end of each of said plates conforming in shape and size to thesaid passages and engageable therein for preventing radial outwardmovement of the plates after insertion into the slots; an individualpresser head on the opposite end'of eachof said plates and flexiblerelative thereto; and, an encircling band of abrasive or grindingmaterial embracing said heads.

2. A grinding or abrasive wheel of the class described, comprising: arigid rotatable wheel having inwardly from the periphery thereof aplurality of axially directed passages formed therethrough and arrangedcircumferentially in spaced relation and provided with chordallydirected slots extending outwardly from the passages and opening throughthe periphery, said slots being of less thickness than the diameter ofsaid passages; a flexible plate engageable in each of said slots; a beadon one end of each of said plates conforming in shape and size to thesaid passages and engageable therein for preventing radial outwardmovement of the plates after insertion into the slots; an individualpresser head on the opposite end of each of said plates and flexiblerelative thereto; an encircling band of abrasive or grinding materialembracing said heads; and, the adjacent faces of adjacent heads beingspaced apart.

3. A grinding or abrasive wheel of the class described, comprising: arigid rotatable wheel having inwardly from the periphery thereof aplurality of axially directed passages formed therethrough and arrangedcircumferentially in spaced relation and provided with chordallydirected slots extending outwardly from the passages and opening throughthe periphery, said slots being of less thickness than the diameter ofsaid passages; a flexible plate engageable in each of said slots; a beadon one end of each of said plates conforming in shape and size to thesaid passages and engageable therein for preventing radial outwardmovement of the plates after insertion into the slots; an individualpresser head on the opposite end of each of said plates and flexiblerelative thereto; an encircling band of abrasive or grinding materialembracing said heads; the adjacent faces of adjacent heads being spacedapart; and, said heads being flexible outwardly upon rotation of saidwheel for firmly engaging said encircling band.

4. A grinding or abrasive wheel of the class described, comprising: arigid rotatable wheel having inwardly from the periphery thereof aplurality of axially directed passages formed therethrough and arrangedcircumferentially in spaced relation and provided with chordallydirected slots extending outwardly from the passages and opening throughthe periphery, said slots being of less thickness than the diameter ofsaid passages; a flexible plate en- 'each of said 'platesand flexiblerelative thereto; an encircling band of abrasive or grinding materialembracing said heads; the adjacent faces of adjacent heads being spacedapart; said heads being flexible outwardly upon rotation of said wheelfor firmly engaging said encircling band; and, the outer faces of saidheads being struck on a radius equal to the radius of the circledetermined by said heads when flexed outwardly.

5. A- grinding or abrasive wheel of the class described, comprising: arigid rotatable wheel having inwardly from the periphery thereof aplurality of axially directed passages formed therethrough and arrangedcircumferentially in spaced relation and provided with chordallydirected slots extending outwardly from the passages and opening throughthe periphery, said slots being of less thickness than the diameter ofsaid passages; a flexible plate engageable in each of said slots; a beadon one end of each of said plates conforming in shape and siZe to thesaid passages and engageable therein for preventing radial outwardmovement of the plates after insertion into the slots; an inidvidualpresser head on the opposite end of each of said plates and beingflexible relative thereto; an encircling band of abrasive or grindingmaterial embracing said heads; the adjacent faces of adjacent headsbeing spaced apart; and, the outer faces of'said heads being curved. a

6. A grinding wheel of the class described, comprising: a rigidrotatable circular core having inwardly from the periphery thereof aplurality of axially directed passages formed therethrough and arrangedcircumferentially in spaced relation and provided with chordallydirected slots extending outwardly from the passages and opening throughthe periphery thereof; said slots being of less thickness than thediameter of said passages; 21 flexible plate engageable in each of saidslots; a bead on one end of each of said plates conforming in shape andsize to said passages and engageable therein for preventing radialoutward movement of the plates after insertion into the slots; anindividual presser head on the opposite end of each of said plates andflexible relative thereto; an encircling band of grinding materialembracing said heads; the adjacent faces of adjacent heads being spacedapart; said heads being flexible outwardly upon rotation of said wheelin one direction to form a substantially continuous circular surface forfirmly engaging said encircling band; the outer faces of said headsbeing struck on a radius equal to the radius of the circle determined bysaid heads when flexed outwardly; and, the inner faces of said headsbeing struck on a radius equal to the radius of said rigid core,whereby, said heads will rest on the outer periphery of said core whenthe wheel is at rest.

References Cited in the file of this patent UNETED STATES PATENTS2,483,422 Larson Oct. 4, 1949 2,548,166 Larson Apr. 10, 1951 2,709,879Larson June 7, 1955

